Electric ignition device.



A. R. MOSLER.

ELECTRIC IGNITION DEVICE. APPLICATION IILIID JULY 10, 1908,

Patented May 2, I911.

' hydrocarbon engines the parts "re-en, n. Y.,

1 t me.

ASSIGNOR UK) A. R. MOSLER & 00., OF NEW.

.ELECTRIO IGNITION DEVICE.

Application filed JulylO, 1908. Serial No. 442,931.

T 0 all whom it may concern:

Be it known that I, ARTHUR H. Mosrnn, a citizen of the United States,and resident of the borough of Manhattam in the city and State or NewYork, have invented a new and useful Improvement in. Electric IgnitionDevices, of which the following is a specification.

lily invention consists in an improvement in electric ignition devicesand has for its object to provide a multiple electric ignition devicewhich is particularly well adapted for use in connection with double ormultiple sys toms of ignition in connection with explosive structed andarranged that a cluster shell of: novel construction forms one electrodeand the conducting wires of the several plugs term the other electrodes,a glass sight beingprovided, which glass sight is trained upon thesparking points of the electrodes so that the character of the sparksmay be observed from the QYt-GllOl of the engine.

A practical embodiment of my invention is represented. in theaccompanying drawings, in which- Figure 1 represents a top plan view omy multiple ignition device attached to the cylinder of an. explosivehydrocarbon engine, Fig. 2 is a section taken in the plane of the line Ae of Fig. 1, looking in the direction of the arrows, Fig. 3 is aninverted plan view of the cluster shell, and liig. 4+. detail sectionalview of a modified form.

The portion of the cylinder of an explosive hydrocarbon engine isdenoted by 1. its explosive chamber by Z and its inlet valve by 5.

In. the "form shown in Figs. 1 to 3, inclusive, the cluster shell whichforms part of the plural electric ignition device comprises an. innermember i, an outer member 5, and an intermediate member 6. The outermemher 5 has a screw threaded engagement with the hole 7, theintermediate member 6 has ascrew threaded engagement with the outer her5 and the inner member l has a screw threaded engagement with theintermediate member 6. This inner member is provided with one or moreopen. 8 in its ""de walls beyond the end of the intermedi- 16 member 6and a omit-rally arranged opening 9 in its end.

A packing ring tweenthe outer m.

10 may be interposed be amber and the wall of the Specification ofLetters Patent.

Patent-ed May 2, 1911.

being so conengine cylinder be provided between the intermediate andouter members.

The intermediate member 6 is provided with a plurality of screw threadedholes 12. In the present instance, three-ct these holes are shown forreceiving one or more spark plugs as the case may be. in the presentinstance, two of these holes are shown as receiving spark plugs and theother hole is shown as receiving a magnifying glass sight. Thismagnifying glass sight comprises a plug 18 having a screw threadedengagement with one 01'' the holes 152 and a magnifying glass 1i held inposition by a ring '15, which magnifying glass is trained upon the hole9 in the end of the inner member 4 for indicating to the observer thecharacter of the sparks of the electric ignition device.

The conducting. wires 16 wl'iich term the central electrode of the twospark plugs oxtend diagonally inward so as to bring their pointsadjacent to the walls of the hole 9, the distance between the walls ofthe hole and the point of each of the conducting wires being less thanthe distance between sai points, so as to absolutely insure theformation of the sparks bctweei'i each of the points and the wells orthe hole rather than between the points themselves. Each. of theseconducting wires 16 is PYOVllli with an insulating block 17 heldinposition between the screw plug 18 and cap 19.

"lhe conducting wire 1.6 is held in position between a. nut 20 in arecess .21 and thumb nut 22 engaging the outer end of the b 17. A.wasl'ier 23 is interposed etween nut 20 and the block i? for f ing Inthe form s tight joint at this point. v in F 1g. 4i, a smgle meinlier24k 1s provide. it

stead of the inner and intermediate 11 hers, and the openings 8 and holeformed therein.

it is evident that a multiple electric igni tion deviee of thischaracter may be made number of spark 'sh to limit myself and a packingring 11 may i having its conducting Wire forn'i the other electrode, anda magnifying; glass sight mounted in said shell and trained upon the endof the said inner nnnnber.

2; A plural eleetrie ignition device comprising a cluster shell having aseparable inner member provided with holes t lirrough its end and sidewalls and forming one electrode, spark plugs mounted in said clusterShell and having their conducting wires form other electrodes, and ainagnifving glass sight mounted in said shell and tan: med upon the endof the said inner member.

3. An electric ignition device comprising a cluster shell havingseparable inner, outer and intermediate members, the said inner memberbeing provided with holes through its end and sidewalls and forming oneelectrode, a spark plug mounted in the intermediate member and havingits conducting wire fornrthe other electrode, and a magniying glasssight also mounted in the interl I, l

eemee mediate member and traii'led upon the end of the inner men'iber.

4. A plural electric ignition device comprising a cluster shell havingseparable inner, outer and interm diate members, the said inner n'iemberbeing; provided with holes through its end and side walls and formingoneelectrode, spark plugs mounted in the intermediate men'tber and havingtheir conducting wires form other eleetrmles, and a magnifying glasssight also mount-ed in the intermediate nieinl'axr and traintal upon theend of the innermember.

in teslin'ionv, that; 1 claim the foregoing as my invention. 1 ha v0signed my name in presenee of two witnesses, this twenty fourth lay ofJune 1908.

A. ll'lllUR R. MOSLER. Witnesses F. Gnonoic BARRY, C. S. Sun-noses.

